Safety lock



FIG. 1 is a front, right and top perspective view of a safety lock showing my new design;

FIG. 2 is a rear, left and top perspective view thereof;

FIG. 3 is a rear, left and top perspective view with the keeper engaged with the lock;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is bottom plan view thereof.

The broken lines are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for a safety lock, as shown and described. 